The Mad Doctor Of Market Street (1942)

Starring Una Merkel, Lionel Atwill, Claire Dodd, Nat Pendleton, Richard Davies
Directed by Joseph H. Lewis
(actor & director credits courtesy IMDB.com)

After a failed experiment that ends in murder, a reckless scientist flees the police aboard a doomed cruise ship, and is stranded with his fellow passengers on a South Seas island. 

An entertaining horror-adventure film from Universal, with Atwill in fine form as his typical sinister man of science, the picture also features a wonderful supporting cast, playing an amiable lot of characters stranded with Atwill.  Merkel and Pendleton in particular lighten up the proceedings with their usual comedic shtick.  It may not be a great film, but it's more than representative of the fun potboilers Universal was putting out for the better part of the decade.